Teaching Haryana (HPSC) Assistant Professor Mock Test 2025 Life Sciences Cellular Organization Membrane structure and function
Which one of the following statements about spectrin, ankyrin, and peripheral proteins of the plasma membrane is INCORRECT?
1
Spectrin is a type of fibrous protein that forms a mesh-like structure on the cytoplasmic side of the red blood cell membrane, contributing to the cell's flexibility and shape.
2
Ankyrin serves as a link between spectrin and integral membrane proteins, facilitating the attachment of the spectrin-based meshwork to the plasma membrane.
3
Peripheral proteins, such as spectrin and ankyrin, directly propagate across the lipid bilayer, providing structural support from within the phospholipid layer.
4
The complex of spectrin, ankyrin, and other associated proteins is crucial for maintaining the shape and mechanical properties of certain cell types, particularly erythrocytes (red blood cells).
5
Question Not Attempted